- 153 — 



A specimen of S. oligosporum, I received from Mr. Svedelius, growing in 

 the walls of Polysiphonia, had the basal filaments for the most part united 

 in a pseudoparenchyma. The number of chromatophores and the branching 

 of the basal filaments was the same as in S. Stilophoræ var. cæspitosa 

 The hairs had also a sheath below. The erect portion of the frond is 

 much less developed, the sporangia sessile, simple and much shorter, 

 than in the named variety. 



The species is only known from few places, but 1 think it will prove 

 to be much more common. 



E. I cel. Holmanes. 

 N. I c el. Eyjafjöröur. 

 NW. I cel. Skalholtsvik; 

 SW. Icel. Reykjavik. 

 S. Icel. Vestmannaeyjar. 



Latravi'k in Aöälvfk (G. O.). 



Pylaiella littoralis (L.) Kjellm. Ectocarpus ]., 

 Kuck. Ectoc. p. 7; Rosenv. Grl. Havalg. p. 881 ; 

 Pylaiella littoralis, P. varia Kjellm. Handbok p. 83. 



var. opposita Kjellm. Resides the typical 

 form, which occurs everywhere along the coast, 

 1 have in one place, Kolfreyjustaöur in E. Icel.. 

 met with f. rupincola Kjellm. 



var. firma (J. Ag.) Kjellm. is found here 

 and there along the coasts. Resides the typical 

 form, I think I have been able to discern f. sub- 

 glomerata Kuck. and f. pachycarpa Kuck. 



var. divaricata Kjellm. has only been found 

 in some few places. I have not met with the 

 typical form, but a specimen collected by Strom- 

 felt in E. Iceland and bv him determined as 



f. compacta Kjellm., is "to be referred to it. K * 13 - p V lMla littoralis 

 „ , (L.) Kjellm. var. varia 



b . ramettosa Kuck. 1 have met with m tew places /T .. n , T/ , e . . 



• r (Kjellm.) Kuck. r. typica 



in N. Icel., NW. Icel. and SW. Icel. usually down with p l ur il 0 cular sporangia, 

 to a depth of 6 fathoms on Alaria esculenta (126 : 1.) 



and other algæ. 



var. varia (Kjellm.) Kuck. 



f. typica, Pylaiella varia Kjellm. Arct. Alg. p. 282. 



I have only met with the typical form. It is both found loose and 

 growing on other algæ e. g. Ascophyllum nodosum in the litoral region, 

 and on Saccorhiza dermatodea and Alaria esculenta in the sublitoral region 

 dow r n to a depth of 5 fathoms. Gathered with unilocular and plurilocular 

 sporangia in Juli — September. This var. has only been found in following- 

 places : 



